Unlock: Finish Konquest mode with all the characters. Highlight Cyrax at the character select screen, hold Down and press Start. 
OR
Open koffin YP with: 511 Gold Koins in the Krypt. 

*Note - Mokap has three non-unique fighting styles, no weapon, non-unique moves, and no fatality.

Status: Motion Capture Specialist
Alignment: Unknown
Origin: ?
Weight: Unknown
Height: Unknown
Fighting Styles: Karate, Tai Chi, Tae Kwon Do
Weapon: None
Difficulty:  Unknown

Bio:
A former martial arts teacher on the North side of Chicago, the man commonly referred to as Mokap was called upon by Johnny Cage to do some motion capture work for his new movie "Mortal Kombat: Deadly Alliance." Mokap was flown to Hollywood to begin his first session, which consisted mainly of the Crane and Snake styles. Although many other martial artists were used, Mokap was brought in repeatedly for his vast knowledge of fighting techniques.

Special Moves:
Fireball: B, F + (A1)
Charge Punch: D, F + (A3)
Flip Kick: D, B + (A4)

Fatality:
None

Useful Kombos:
Karate:
1.) The Foot Sword - A3, A3, A3
2.) Acoustic - A1, A2, CS, A2, CS, A4
Tai Chi:
1.) Play by Ear - A2, A2, A2, A3
2.) 5 Poison Hands - A2, A2, CS, A1, A1
Tae Kwon Do:
1.) Clearness of Mind - A4, A4
2.) Special Forces - A4, B + A3, A3

Ending:
Mokap Man was the primary martial arts talent for motion capture during the production of Johnny Cage's movie based on recent events in Outworld. 
He was referred to the game designers at Midway Games and used in the production of the Video Game adaptation of the movie. The End.